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1/*
2 * Sun3 i82586 Ethernet driver
3 *
4 * Cloned from ni52.c for the Sun3 by Sam Creasey (sammy@sammy.net)
5 *
6 * Original copyright follows:
7 * --------------------------
8 *
9 * net-3-driver for the NI5210 card (i82586 Ethernet chip)
10 *
11 * This is an extension to the Linux operating system, and is covered by the
12 * same Gnu Public License that covers that work.
13 *
14 * Alphacode 0.82 (96/09/29) for Linux 2.0.0 (or later)
15 * Copyrights (c) 1994,1995,1996 by M.Hipp (hippm@informatik.uni-tuebingen.de)
16 * --------------------------
17 *
18 * Consult ni52.c for further notes from the original driver.
19 *
20 * This incarnation currently supports the OBIO version of the i82586 chip
21 * used in certain sun3 models. It should be fairly doable to expand this
22 * to support VME if I should every acquire such a board.
23 *
24 */
25
26static int debuglevel = 0; /* debug-printk 0: off 1: a few 2: more */
27static int automatic_resume = 0; /* experimental .. better should be zero */
28static int rfdadd = 0; /* rfdadd=1 may be better for 8K MEM cards */
29static int fifo=0x8; /* don't change */
30
31#include <linux/kernel.h>
32#include <linux/string.h>
33#include <linux/errno.h>
34#include <linux/ioport.h>
35#include <linux/interrupt.h>
36#include <linux/delay.h>
37#include <linux/init.h>
38#include <linux/bitops.h>
39#include <asm/io.h>
40#include <asm/idprom.h>
41#include <asm/machines.h>
42#include <asm/sun3mmu.h>
43#include <asm/dvma.h>
44#include <asm/byteorder.h>
45
46#include <linux/netdevice.h>
47#include <linux/etherdevice.h>
48#include <linux/skbuff.h>
49
50#include "sun3_82586.h"
51
52#define DRV_NAME "sun3_82586"
53
54#define DEBUG /* debug on */
55#define SYSBUSVAL 0 /* 16 Bit */
56#define SUN3_82586_TOTAL_SIZE PAGE_SIZE
57
58#define sun3_attn586() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_ATTEN; *(volatile unsigned char *)(dev->base_addr) &= ~IEOB_ATTEN;}
59#define sun3_reset586() {*(volatile unsigned char *)(dev->base_addr) = 0; udelay(100); *(volatile unsigned char *)(dev->base_addr) = IEOB_NORSET;}
60#define sun3_disint() {*(volatile unsigned char *)(dev->base_addr) &= ~IEOB_IENAB;}
61#define sun3_enaint() {*(volatile unsigned char *)(dev->base_addr) |= IEOB_IENAB;}
62#define sun3_active() {*(volatile unsigned char *)(dev->base_addr) |= (IEOB_IENAB|IEOB_ONAIR|IEOB_NORSET);}
63
64#define make32(ptr16) (p->memtop + (swab16((unsigned short) (ptr16))) )
65#define make24(ptr32) (char *)swab32(( ((unsigned long) (ptr32)) - p->base))
66#define make16(ptr32) (swab16((unsigned short) ((unsigned long)(ptr32) - (unsigned long) p->memtop )))
67
68/******************* how to calculate the buffers *****************************
69
70 * IMPORTANT NOTE: if you configure only one NUM_XMIT_BUFFS, the driver works
71 * --------------- in a different (more stable?) mode. Only in this mode it's
72 * possible to configure the driver with 'NO_NOPCOMMANDS'
73
74sizeof(scp)=12; sizeof(scb)=16; sizeof(iscp)=8;
75sizeof(scp)+sizeof(iscp)+sizeof(scb) = 36 = INIT
76sizeof(rfd) = 24; sizeof(rbd) = 12;
77sizeof(tbd) = 8; sizeof(transmit_cmd) = 16;
78sizeof(nop_cmd) = 8;
79
80 * if you don't know the driver, better do not change these values: */
81
82#define RECV_BUFF_SIZE 1536 /* slightly oversized */
83#define XMIT_BUFF_SIZE 1536 /* slightly oversized */
84#define NUM_XMIT_BUFFS 1 /* config for 32K shmem */
85#define NUM_RECV_BUFFS_8 4 /* config for 32K shared mem */
86#define NUM_RECV_BUFFS_16 9 /* config for 32K shared mem */
87#define NUM_RECV_BUFFS_32 16 /* config for 32K shared mem */
88#define NO_NOPCOMMANDS /* only possible with NUM_XMIT_BUFFS=1 */
89
90/**************************************************************************/
91
92/* different DELAYs */
93#define DELAY(x) mdelay(32 * x);
94#define DELAY_16(); { udelay(16); }
95#define DELAY_18(); { udelay(4); }
96
97/* wait for command with timeout: */
98#define WAIT_4_SCB_CMD() \
99{ int i; \
100 for(i=0;i<16384;i++) { \
101 if(!p->scb->cmd_cuc) break; \
102 DELAY_18(); \
103 if(i == 16383) { \
104 printk("%s: scb_cmd timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_cuc,p->scb->cus); \
105 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
106
107#define WAIT_4_SCB_CMD_RUC() { int i; \
108 for(i=0;i<16384;i++) { \
109 if(!p->scb->cmd_ruc) break; \
110 DELAY_18(); \
111 if(i == 16383) { \
112 printk("%s: scb_cmd (ruc) timed out: %04x,%04x .. disabling i82586!!\n",dev->name,p->scb->cmd_ruc,p->scb->rus); \
113 if(!p->reseted) { p->reseted = 1; sun3_reset586(); } } } }
114
115#define WAIT_4_STAT_COMPL(addr) { int i; \
116 for(i=0;i<32767;i++) { \
117 if(swab16((addr)->cmd_status) & STAT_COMPL) break; \
118 DELAY_16(); DELAY_16(); } }
119
120static int sun3_82586_probe1(struct net_device *dev,int ioaddr);
121static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id);
122static int sun3_82586_open(struct net_device *dev);
123static int sun3_82586_close(struct net_device *dev);
124static int sun3_82586_send_packet(struct sk_buff *,struct net_device *);
125static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev);
126static void set_multicast_list(struct net_device *dev);
127static void sun3_82586_timeout(struct net_device *dev);
128#if 0
129static void sun3_82586_dump(struct net_device *,void *);
130#endif
131
132/* helper-functions */
133static int init586(struct net_device *dev);
134static int check586(struct net_device *dev,char *where,unsigned size);
135static void alloc586(struct net_device *dev);
136static void startrecv586(struct net_device *dev);
137static void *alloc_rfa(struct net_device *dev,void *ptr);
138static void sun3_82586_rcv_int(struct net_device *dev);
139static void sun3_82586_xmt_int(struct net_device *dev);
140static void sun3_82586_rnr_int(struct net_device *dev);
141
142struct priv
143{
144 unsigned long base;
145 char *memtop;
146 long int lock;
147 int reseted;
148 volatile struct rfd_struct *rfd_last,*rfd_top,*rfd_first;
149 volatile struct scp_struct *scp; /* volatile is important */
150 volatile struct iscp_struct *iscp; /* volatile is important */
151 volatile struct scb_struct *scb; /* volatile is important */
152 volatile struct tbd_struct *xmit_buffs[NUM_XMIT_BUFFS];
153 volatile struct transmit_cmd_struct *xmit_cmds[NUM_XMIT_BUFFS];
154#if (NUM_XMIT_BUFFS == 1)
155 volatile struct nop_cmd_struct *nop_cmds[2];
156#else
157 volatile struct nop_cmd_struct *nop_cmds[NUM_XMIT_BUFFS];
158#endif
159 volatile int nop_point,num_recv_buffs;
160 volatile char *xmit_cbuffs[NUM_XMIT_BUFFS];
161 volatile int xmit_count,xmit_last;
162};
163
164/**********************************************
165 * close device
166 */
167static int sun3_82586_close(struct net_device *dev)
168{
169 free_irq(dev->irq, dev);
170
171 sun3_reset586(); /* the hard way to stop the receiver */
172
173 netif_stop_queue(dev);
174
175 return 0;
176}
177
178/**********************************************
179 * open device
180 */
181static int sun3_82586_open(struct net_device *dev)
182{
183 int ret;
184
185 sun3_disint();
186 alloc586(dev);
187 init586(dev);
188 startrecv586(dev);
189 sun3_enaint();
190
191 ret = request_irq(dev->irq, sun3_82586_interrupt,0,dev->name,dev);
192 if (ret)
193 {
194 sun3_reset586();
195 return ret;
196 }
197
198 netif_start_queue(dev);
199
200 return 0; /* most done by init */
201}
202
203/**********************************************
204 * Check to see if there's an 82586 out there.
205 */
206static int check586(struct net_device *dev,char *where,unsigned size)
207{
208 struct priv pb;
209 struct priv *p = &pb;
210 char *iscp_addr;
211 int i;
212
213 p->base = (unsigned long) dvma_btov(0);
214 p->memtop = (char *)dvma_btov((unsigned long)where);
215 p->scp = (struct scp_struct *)(p->base + SCP_DEFAULT_ADDRESS);
216 memset((char *)p->scp,0, sizeof(struct scp_struct));
217 for(i=0;i<sizeof(struct scp_struct);i++) /* memory was writeable? */
218 if(((char *)p->scp)[i])
219 return 0;
220 p->scp->sysbus = SYSBUSVAL; /* 1 = 8Bit-Bus, 0 = 16 Bit */
221 if(p->scp->sysbus != SYSBUSVAL)
222 return 0;
223
224 iscp_addr = (char *)dvma_btov((unsigned long)where);
225
226 p->iscp = (struct iscp_struct *) iscp_addr;
227 memset((char *)p->iscp,0, sizeof(struct iscp_struct));
228
229 p->scp->iscp = make24(p->iscp);
230 p->iscp->busy = 1;
231
232 sun3_reset586();
233 sun3_attn586();
234 DELAY(1); /* wait a while... */
235
236 if(p->iscp->busy) /* i82586 clears 'busy' after successful init */
237 return 0;
238
239 return 1;
240}
241
242/******************************************************************
243 * set iscp at the right place, called by sun3_82586_probe1 and open586.
244 */
245static void alloc586(struct net_device *dev)
246{
247 struct priv *p = netdev_priv(dev);
248
249 sun3_reset586();
250 DELAY(1);
251
252 p->scp = (struct scp_struct *) (p->base + SCP_DEFAULT_ADDRESS);
253 p->iscp = (struct iscp_struct *) dvma_btov(dev->mem_start);
254 p->scb = (struct scb_struct *) ((char *)p->iscp + sizeof(struct iscp_struct));
255
256 memset((char *) p->iscp,0,sizeof(struct iscp_struct));
257 memset((char *) p->scp ,0,sizeof(struct scp_struct));
258
259 p->scp->iscp = make24(p->iscp);
260 p->scp->sysbus = SYSBUSVAL;
261 p->iscp->scb_offset = make16(p->scb);
262 p->iscp->scb_base = make24(dvma_btov(dev->mem_start));
263
264 p->iscp->busy = 1;
265 sun3_reset586();
266 sun3_attn586();
267
268 DELAY(1);
269
270 if(p->iscp->busy)
271 printk("%s: Init-Problems (alloc).\n",dev->name);
272
273 p->reseted = 0;
274
275 memset((char *)p->scb,0,sizeof(struct scb_struct));
276}
277
278struct net_device * __init sun3_82586_probe(int unit)
279{
280 struct net_device *dev;
281 unsigned long ioaddr;
282 static int found = 0;
283 int err = -ENOMEM;
284
285 /* check that this machine has an onboard 82586 */
286 switch(idprom->id_machtype) {
287 case SM_SUN3|SM_3_160:
288 case SM_SUN3|SM_3_260:
289 /* these machines have 82586 */
290 break;
291
292 default:
293 return ERR_PTR(-ENODEV);
294 }
295
296 if (found)
297 return ERR_PTR(-ENODEV);
298
299 ioaddr = (unsigned long)ioremap(IE_OBIO, SUN3_82586_TOTAL_SIZE);
300 if (!ioaddr)
301 return ERR_PTR(-ENOMEM);
302 found = 1;
303
304 dev = alloc_etherdev(sizeof(struct priv));
305 if (!dev)
306 goto out;
307 if (unit >= 0) {
308 sprintf(dev->name, "eth%d", unit);
309 netdev_boot_setup_check(dev);
310 }
311
312 dev->irq = IE_IRQ;
313 dev->base_addr = ioaddr;
314 err = sun3_82586_probe1(dev, ioaddr);
315 if (err)
316 goto out1;
317 err = register_netdev(dev);
318 if (err)
319 goto out2;
320 return dev;
321
322out2:
323 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
324out1:
325 free_netdev(dev);
326out:
327 iounmap((void __iomem *)ioaddr);
328 return ERR_PTR(err);
329}
330
331static const struct net_device_ops sun3_82586_netdev_ops = {
332 .ndo_open = sun3_82586_open,
333 .ndo_stop = sun3_82586_close,
334 .ndo_start_xmit = sun3_82586_send_packet,
335 .ndo_set_rx_mode = set_multicast_list,
336 .ndo_tx_timeout = sun3_82586_timeout,
337 .ndo_get_stats = sun3_82586_get_stats,
338 .ndo_validate_addr = eth_validate_addr,
339 .ndo_set_mac_address = eth_mac_addr,
340};
341
342static int __init sun3_82586_probe1(struct net_device *dev,int ioaddr)
343{
344 int i, size, retval;
345
346 if (!request_region(ioaddr, SUN3_82586_TOTAL_SIZE, DRV_NAME))
347 return -EBUSY;
348
349 /* copy in the ethernet address from the prom */
350 for(i = 0; i < 6 ; i++)
351 dev->dev_addr[i] = idprom->id_ethaddr[i];
352
353 printk("%s: SUN3 Intel 82586 found at %lx, ",dev->name,dev->base_addr);
354
355 /*
356 * check (or search) IO-Memory, 32K
357 */
358 size = 0x8000;
359
360 dev->mem_start = (unsigned long)dvma_malloc_align(0x8000, 0x1000);
361 dev->mem_end = dev->mem_start + size;
362
363 if(size != 0x2000 && size != 0x4000 && size != 0x8000) {
364 printk("\n%s: Illegal memory size %d. Allowed is 0x2000 or 0x4000 or 0x8000 bytes.\n",dev->name,size);
365 retval = -ENODEV;
366 goto out;
367 }
368 if(!check586(dev,(char *) dev->mem_start,size)) {
369 printk("?memcheck, Can't find memory at 0x%lx with size %d!\n",dev->mem_start,size);
370 retval = -ENODEV;
371 goto out;
372 }
373
374 ((struct priv *)netdev_priv(dev))->memtop =
375 (char *)dvma_btov(dev->mem_start);
376 ((struct priv *)netdev_priv(dev))->base = (unsigned long) dvma_btov(0);
377 alloc586(dev);
378
379 /* set number of receive-buffs according to memsize */
380 if(size == 0x2000)
381 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
382 NUM_RECV_BUFFS_8;
383 else if(size == 0x4000)
384 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
385 NUM_RECV_BUFFS_16;
386 else
387 ((struct priv *)netdev_priv(dev))->num_recv_buffs =
388 NUM_RECV_BUFFS_32;
389
390 printk("Memaddr: 0x%lx, Memsize: %d, IRQ %d\n",dev->mem_start,size, dev->irq);
391
392 dev->netdev_ops = &sun3_82586_netdev_ops;
393 dev->watchdog_timeo = HZ/20;
394
395 dev->if_port = 0;
396 return 0;
397out:
398 release_region(ioaddr, SUN3_82586_TOTAL_SIZE);
399 return retval;
400}
401
402
403static int init586(struct net_device *dev)
404{
405 void *ptr;
406 int i,result=0;
407 struct priv *p = netdev_priv(dev);
408 volatile struct configure_cmd_struct *cfg_cmd;
409 volatile struct iasetup_cmd_struct *ias_cmd;
410 volatile struct tdr_cmd_struct *tdr_cmd;
411 volatile struct mcsetup_cmd_struct *mc_cmd;
412 struct netdev_hw_addr *ha;
413 int num_addrs=netdev_mc_count(dev);
414
415 ptr = (void *) ((char *)p->scb + sizeof(struct scb_struct));
416
417 cfg_cmd = (struct configure_cmd_struct *)ptr; /* configure-command */
418 cfg_cmd->cmd_status = 0;
419 cfg_cmd->cmd_cmd = swab16(CMD_CONFIGURE | CMD_LAST);
420 cfg_cmd->cmd_link = 0xffff;
421
422 cfg_cmd->byte_cnt = 0x0a; /* number of cfg bytes */
423 cfg_cmd->fifo = fifo; /* fifo-limit (8=tx:32/rx:64) */
424 cfg_cmd->sav_bf = 0x40; /* hold or discard bad recv frames (bit 7) */
425 cfg_cmd->adr_len = 0x2e; /* addr_len |!src_insert |pre-len |loopback */
426 cfg_cmd->priority = 0x00;
427 cfg_cmd->ifs = 0x60;
428 cfg_cmd->time_low = 0x00;
429 cfg_cmd->time_high = 0xf2;
430 cfg_cmd->promisc = 0;
431 if(dev->flags & IFF_ALLMULTI) {
432 int len = ((char *) p->iscp - (char *) ptr - 8) / 6;
433 if(num_addrs > len) {
434 printk("%s: switching to promisc. mode\n",dev->name);
435 cfg_cmd->promisc = 1;
436 }
437 }
438 if(dev->flags&IFF_PROMISC)
439 cfg_cmd->promisc = 1;
440 cfg_cmd->carr_coll = 0x00;
441
442 p->scb->cbl_offset = make16(cfg_cmd);
443 p->scb->cmd_ruc = 0;
444
445 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
446 sun3_attn586();
447
448 WAIT_4_STAT_COMPL(cfg_cmd);
449
450 if((swab16(cfg_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_COMPL|STAT_OK))
451 {
452 printk("%s: configure command failed: %x\n",dev->name,swab16(cfg_cmd->cmd_status));
453 return 1;
454 }
455
456 /*
457 * individual address setup
458 */
459
460 ias_cmd = (struct iasetup_cmd_struct *)ptr;
461
462 ias_cmd->cmd_status = 0;
463 ias_cmd->cmd_cmd = swab16(CMD_IASETUP | CMD_LAST);
464 ias_cmd->cmd_link = 0xffff;
465
466 memcpy((char *)&ias_cmd->iaddr,(char *) dev->dev_addr,ETH_ALEN);
467
468 p->scb->cbl_offset = make16(ias_cmd);
469
470 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
471 sun3_attn586();
472
473 WAIT_4_STAT_COMPL(ias_cmd);
474
475 if((swab16(ias_cmd->cmd_status) & (STAT_OK|STAT_COMPL)) != (STAT_OK|STAT_COMPL)) {
476 printk("%s (82586): individual address setup command failed: %04x\n",dev->name,swab16(ias_cmd->cmd_status));
477 return 1;
478 }
479
480 /*
481 * TDR, wire check .. e.g. no resistor e.t.c
482 */
483
484 tdr_cmd = (struct tdr_cmd_struct *)ptr;
485
486 tdr_cmd->cmd_status = 0;
487 tdr_cmd->cmd_cmd = swab16(CMD_TDR | CMD_LAST);
488 tdr_cmd->cmd_link = 0xffff;
489 tdr_cmd->status = 0;
490
491 p->scb->cbl_offset = make16(tdr_cmd);
492 p->scb->cmd_cuc = CUC_START; /* cmd.-unit start */
493 sun3_attn586();
494
495 WAIT_4_STAT_COMPL(tdr_cmd);
496
497 if(!(swab16(tdr_cmd->cmd_status) & STAT_COMPL))
498 {
499 printk("%s: Problems while running the TDR.\n",dev->name);
500 }
501 else
502 {
503 DELAY_16(); /* wait for result */
504 result = swab16(tdr_cmd->status);
505
506 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
507 sun3_attn586(); /* ack the interrupts */
508
509 if(result & TDR_LNK_OK)
510 ;
511 else if(result & TDR_XCVR_PRB)
512 printk("%s: TDR: Transceiver problem. Check the cable(s)!\n",dev->name);
513 else if(result & TDR_ET_OPN)
514 printk("%s: TDR: No correct termination %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
515 else if(result & TDR_ET_SRT)
516 {
517 if (result & TDR_TIMEMASK) /* time == 0 -> strange :-) */
518 printk("%s: TDR: Detected a short circuit %d clocks away.\n",dev->name,result & TDR_TIMEMASK);
519 }
520 else
521 printk("%s: TDR: Unknown status %04x\n",dev->name,result);
522 }
523
524 /*
525 * Multicast setup
526 */
527 if(num_addrs && !(dev->flags & IFF_PROMISC) )
528 {
529 mc_cmd = (struct mcsetup_cmd_struct *) ptr;
530 mc_cmd->cmd_status = 0;
531 mc_cmd->cmd_cmd = swab16(CMD_MCSETUP | CMD_LAST);
532 mc_cmd->cmd_link = 0xffff;
533 mc_cmd->mc_cnt = swab16(num_addrs * 6);
534
535 i = 0;
536 netdev_for_each_mc_addr(ha, dev)
537 memcpy((char *) mc_cmd->mc_list[i++],
538 ha->addr, ETH_ALEN);
539
540 p->scb->cbl_offset = make16(mc_cmd);
541 p->scb->cmd_cuc = CUC_START;
542 sun3_attn586();
543
544 WAIT_4_STAT_COMPL(mc_cmd);
545
546 if( (swab16(mc_cmd->cmd_status) & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
547 printk("%s: Can't apply multicast-address-list.\n",dev->name);
548 }
549
550 /*
551 * alloc nop/xmit-cmds
552 */
553#if (NUM_XMIT_BUFFS == 1)
554 for(i=0;i<2;i++)
555 {
556 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
557 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
558 p->nop_cmds[i]->cmd_status = 0;
559 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
560 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
561 }
562#else
563 for(i=0;i<NUM_XMIT_BUFFS;i++)
564 {
565 p->nop_cmds[i] = (struct nop_cmd_struct *)ptr;
566 p->nop_cmds[i]->cmd_cmd = swab16(CMD_NOP);
567 p->nop_cmds[i]->cmd_status = 0;
568 p->nop_cmds[i]->cmd_link = make16((p->nop_cmds[i]));
569 ptr = (char *) ptr + sizeof(struct nop_cmd_struct);
570 }
571#endif
572
573 ptr = alloc_rfa(dev,ptr); /* init receive-frame-area */
574
575 /*
576 * alloc xmit-buffs / init xmit_cmds
577 */
578 for(i=0;i<NUM_XMIT_BUFFS;i++)
579 {
580 p->xmit_cmds[i] = (struct transmit_cmd_struct *)ptr; /*transmit cmd/buff 0*/
581 ptr = (char *) ptr + sizeof(struct transmit_cmd_struct);
582 p->xmit_cbuffs[i] = (char *)ptr; /* char-buffs */
583 ptr = (char *) ptr + XMIT_BUFF_SIZE;
584 p->xmit_buffs[i] = (struct tbd_struct *)ptr; /* TBD */
585 ptr = (char *) ptr + sizeof(struct tbd_struct);
586 if(ptr > (void *)dev->mem_end)
587 {
588 printk("%s: not enough shared-mem for your configuration!\n",dev->name);
589 return 1;
590 }
591 memset((char *)(p->xmit_cmds[i]) ,0, sizeof(struct transmit_cmd_struct));
592 memset((char *)(p->xmit_buffs[i]),0, sizeof(struct tbd_struct));
593 p->xmit_cmds[i]->cmd_link = make16(p->nop_cmds[(i+1)%NUM_XMIT_BUFFS]);
594 p->xmit_cmds[i]->cmd_status = swab16(STAT_COMPL);
595 p->xmit_cmds[i]->cmd_cmd = swab16(CMD_XMIT | CMD_INT);
596 p->xmit_cmds[i]->tbd_offset = make16((p->xmit_buffs[i]));
597 p->xmit_buffs[i]->next = 0xffff;
598 p->xmit_buffs[i]->buffer = make24((p->xmit_cbuffs[i]));
599 }
600
601 p->xmit_count = 0;
602 p->xmit_last = 0;
603#ifndef NO_NOPCOMMANDS
604 p->nop_point = 0;
605#endif
606
607 /*
608 * 'start transmitter'
609 */
610#ifndef NO_NOPCOMMANDS
611 p->scb->cbl_offset = make16(p->nop_cmds[0]);
612 p->scb->cmd_cuc = CUC_START;
613 sun3_attn586();
614 WAIT_4_SCB_CMD();
615#else
616 p->xmit_cmds[0]->cmd_link = make16(p->xmit_cmds[0]);
617 p->xmit_cmds[0]->cmd_cmd = swab16(CMD_XMIT | CMD_SUSPEND | CMD_INT);
618#endif
619
620 /*
621 * ack. interrupts
622 */
623 p->scb->cmd_cuc = p->scb->cus & STAT_MASK;
624 sun3_attn586();
625 DELAY_16();
626
627 sun3_enaint();
628 sun3_active();
629
630 return 0;
631}
632
633/******************************************************
634 * This is a helper routine for sun3_82586_rnr_int() and init586().
635 * It sets up the Receive Frame Area (RFA).
636 */
637
638static void *alloc_rfa(struct net_device *dev,void *ptr)
639{
640 volatile struct rfd_struct *rfd = (struct rfd_struct *)ptr;
641 volatile struct rbd_struct *rbd;
642 int i;
643 struct priv *p = netdev_priv(dev);
644
645 memset((char *) rfd,0,sizeof(struct rfd_struct)*(p->num_recv_buffs+rfdadd));
646 p->rfd_first = rfd;
647
648 for(i = 0; i < (p->num_recv_buffs+rfdadd); i++) {
649 rfd[i].next = make16(rfd + (i+1) % (p->num_recv_buffs+rfdadd) );
650 rfd[i].rbd_offset = 0xffff;
651 }
652 rfd[p->num_recv_buffs-1+rfdadd].last = RFD_SUSP; /* RU suspend */
653
654 ptr = (void *) (rfd + (p->num_recv_buffs + rfdadd) );
655
656 rbd = (struct rbd_struct *) ptr;
657 ptr = (void *) (rbd + p->num_recv_buffs);
658
659 /* clr descriptors */
660 memset((char *) rbd,0,sizeof(struct rbd_struct)*(p->num_recv_buffs));
661
662 for(i=0;i<p->num_recv_buffs;i++)
663 {
664 rbd[i].next = make16((rbd + (i+1) % p->num_recv_buffs));
665 rbd[i].size = swab16(RECV_BUFF_SIZE);
666 rbd[i].buffer = make24(ptr);
667 ptr = (char *) ptr + RECV_BUFF_SIZE;
668 }
669
670 p->rfd_top = p->rfd_first;
671 p->rfd_last = p->rfd_first + (p->num_recv_buffs - 1 + rfdadd);
672
673 p->scb->rfa_offset = make16(p->rfd_first);
674 p->rfd_first->rbd_offset = make16(rbd);
675
676 return ptr;
677}
678
679
680/**************************************************
681 * Interrupt Handler ...
682 */
683
684static irqreturn_t sun3_82586_interrupt(int irq,void *dev_id)
685{
686 struct net_device *dev = dev_id;
687 unsigned short stat;
688 int cnt=0;
689 struct priv *p;
690
691 if (!dev) {
692 printk ("sun3_82586-interrupt: irq %d for unknown device.\n",irq);
693 return IRQ_NONE;
694 }
695 p = netdev_priv(dev);
696
697 if(debuglevel > 1)
698 printk("I");
699
700 WAIT_4_SCB_CMD(); /* wait for last command */
701
702 while((stat=p->scb->cus & STAT_MASK))
703 {
704 p->scb->cmd_cuc = stat;
705 sun3_attn586();
706
707 if(stat & STAT_FR) /* received a frame */
708 sun3_82586_rcv_int(dev);
709
710 if(stat & STAT_RNR) /* RU went 'not ready' */
711 {
712 printk("(R)");
713 if(p->scb->rus & RU_SUSPEND) /* special case: RU_SUSPEND */
714 {
715 WAIT_4_SCB_CMD();
716 p->scb->cmd_ruc = RUC_RESUME;
717 sun3_attn586();
718 WAIT_4_SCB_CMD_RUC();
719 }
720 else
721 {
722 printk("%s: Receiver-Unit went 'NOT READY': %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->rus);
723 sun3_82586_rnr_int(dev);
724 }
725 }
726
727 if(stat & STAT_CX) /* command with I-bit set complete */
728 sun3_82586_xmt_int(dev);
729
730#ifndef NO_NOPCOMMANDS
731 if(stat & STAT_CNA) /* CU went 'not ready' */
732 {
733 if(netif_running(dev))
734 printk("%s: oops! CU has left active state. stat: %04x/%02x.\n",dev->name,(int) stat,(int) p->scb->cus);
735 }
736#endif
737
738 if(debuglevel > 1)
739 printk("%d",cnt++);
740
741 WAIT_4_SCB_CMD(); /* wait for ack. (sun3_82586_xmt_int can be faster than ack!!) */
742 if(p->scb->cmd_cuc) /* timed out? */
743 {
744 printk("%s: Acknowledge timed out.\n",dev->name);
745 sun3_disint();
746 break;
747 }
748 }
749
750 if(debuglevel > 1)
751 printk("i");
752 return IRQ_HANDLED;
753}
754
755/*******************************************************
756 * receive-interrupt
757 */
758
759static void sun3_82586_rcv_int(struct net_device *dev)
760{
761 int status,cnt=0;
762 unsigned short totlen;
763 struct sk_buff *skb;
764 struct rbd_struct *rbd;
765 struct priv *p = netdev_priv(dev);
766
767 if(debuglevel > 0)
768 printk("R");
769
770 for(;(status = p->rfd_top->stat_high) & RFD_COMPL;)
771 {
772 rbd = (struct rbd_struct *) make32(p->rfd_top->rbd_offset);
773
774 if(status & RFD_OK) /* frame received without error? */
775 {
776 if( (totlen = swab16(rbd->status)) & RBD_LAST) /* the first and the last buffer? */
777 {
778 totlen &= RBD_MASK; /* length of this frame */
779 rbd->status = 0;
780 skb = netdev_alloc_skb(dev, totlen + 2);
781 if(skb != NULL)
782 {
783 skb_reserve(skb,2);
784 skb_put(skb,totlen);
785 skb_copy_to_linear_data(skb,(char *) p->base+swab32((unsigned long) rbd->buffer),totlen);
786 skb->protocol=eth_type_trans(skb,dev);
787 netif_rx(skb);
788 dev->stats.rx_packets++;
789 }
790 else
791 dev->stats.rx_dropped++;
792 }
793 else
794 {
795 int rstat;
796 /* free all RBD's until RBD_LAST is set */
797 totlen = 0;
798 while(!((rstat=swab16(rbd->status)) & RBD_LAST))
799 {
800 totlen += rstat & RBD_MASK;
801 if(!rstat)
802 {
803 printk("%s: Whoops .. no end mark in RBD list\n",dev->name);
804 break;
805 }
806 rbd->status = 0;
807 rbd = (struct rbd_struct *) make32(rbd->next);
808 }
809 totlen += rstat & RBD_MASK;
810 rbd->status = 0;
811 printk("%s: received oversized frame! length: %d\n",dev->name,totlen);
812 dev->stats.rx_dropped++;
813 }
814 }
815 else /* frame !(ok), only with 'save-bad-frames' */
816 {
817 printk("%s: oops! rfd-error-status: %04x\n",dev->name,status);
818 dev->stats.rx_errors++;
819 }
820 p->rfd_top->stat_high = 0;
821 p->rfd_top->last = RFD_SUSP; /* maybe exchange by RFD_LAST */
822 p->rfd_top->rbd_offset = 0xffff;
823 p->rfd_last->last = 0; /* delete RFD_SUSP */
824 p->rfd_last = p->rfd_top;
825 p->rfd_top = (struct rfd_struct *) make32(p->rfd_top->next); /* step to next RFD */
826 p->scb->rfa_offset = make16(p->rfd_top);
827
828 if(debuglevel > 0)
829 printk("%d",cnt++);
830 }
831
832 if(automatic_resume)
833 {
834 WAIT_4_SCB_CMD();
835 p->scb->cmd_ruc = RUC_RESUME;
836 sun3_attn586();
837 WAIT_4_SCB_CMD_RUC();
838 }
839
840#ifdef WAIT_4_BUSY
841 {
842 int i;
843 for(i=0;i<1024;i++)
844 {
845 if(p->rfd_top->status)
846 break;
847 DELAY_16();
848 if(i == 1023)
849 printk("%s: RU hasn't fetched next RFD (not busy/complete)\n",dev->name);
850 }
851 }
852#endif
853
854#if 0
855 if(!at_least_one)
856 {
857 int i;
858 volatile struct rfd_struct *rfds=p->rfd_top;
859 volatile struct rbd_struct *rbds;
860 printk("%s: received a FC intr. without having a frame: %04x %d\n",dev->name,status,old_at_least);
861 for(i=0;i< (p->num_recv_buffs+4);i++)
862 {
863 rbds = (struct rbd_struct *) make32(rfds->rbd_offset);
864 printk("%04x:%04x ",rfds->status,rbds->status);
865 rfds = (struct rfd_struct *) make32(rfds->next);
866 }
867 printk("\nerrs: %04x %04x stat: %04x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->status);
868 printk("\nerrs: %04x %04x rus: %02x, cus: %02x\n",(int)p->scb->rsc_errs,(int)p->scb->ovrn_errs,(int)p->scb->rus,(int)p->scb->cus);
869 }
870 old_at_least = at_least_one;
871#endif
872
873 if(debuglevel > 0)
874 printk("r");
875}
876
877/**********************************************************
878 * handle 'Receiver went not ready'.
879 */
880
881static void sun3_82586_rnr_int(struct net_device *dev)
882{
883 struct priv *p = netdev_priv(dev);
884
885 dev->stats.rx_errors++;
886
887 WAIT_4_SCB_CMD(); /* wait for the last cmd, WAIT_4_FULLSTAT?? */
888 p->scb->cmd_ruc = RUC_ABORT; /* usually the RU is in the 'no resource'-state .. abort it now. */
889 sun3_attn586();
890 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. */
891
892 alloc_rfa(dev,(char *)p->rfd_first);
893/* maybe add a check here, before restarting the RU */
894 startrecv586(dev); /* restart RU */
895
896 printk("%s: Receive-Unit restarted. Status: %04x\n",dev->name,p->scb->rus);
897
898}
899
900/**********************************************************
901 * handle xmit - interrupt
902 */
903
904static void sun3_82586_xmt_int(struct net_device *dev)
905{
906 int status;
907 struct priv *p = netdev_priv(dev);
908
909 if(debuglevel > 0)
910 printk("X");
911
912 status = swab16(p->xmit_cmds[p->xmit_last]->cmd_status);
913 if(!(status & STAT_COMPL))
914 printk("%s: strange .. xmit-int without a 'COMPLETE'\n",dev->name);
915
916 if(status & STAT_OK)
917 {
918 dev->stats.tx_packets++;
919 dev->stats.collisions += (status & TCMD_MAXCOLLMASK);
920 }
921 else
922 {
923 dev->stats.tx_errors++;
924 if(status & TCMD_LATECOLL) {
925 printk("%s: late collision detected.\n",dev->name);
926 dev->stats.collisions++;
927 }
928 else if(status & TCMD_NOCARRIER) {
929 dev->stats.tx_carrier_errors++;
930 printk("%s: no carrier detected.\n",dev->name);
931 }
932 else if(status & TCMD_LOSTCTS)
933 printk("%s: loss of CTS detected.\n",dev->name);
934 else if(status & TCMD_UNDERRUN) {
935 dev->stats.tx_fifo_errors++;
936 printk("%s: DMA underrun detected.\n",dev->name);
937 }
938 else if(status & TCMD_MAXCOLL) {
939 printk("%s: Max. collisions exceeded.\n",dev->name);
940 dev->stats.collisions += 16;
941 }
942 }
943
944#if (NUM_XMIT_BUFFS > 1)
945 if( (++p->xmit_last) == NUM_XMIT_BUFFS)
946 p->xmit_last = 0;
947#endif
948 netif_wake_queue(dev);
949}
950
951/***********************************************************
952 * (re)start the receiver
953 */
954
955static void startrecv586(struct net_device *dev)
956{
957 struct priv *p = netdev_priv(dev);
958
959 WAIT_4_SCB_CMD();
960 WAIT_4_SCB_CMD_RUC();
961 p->scb->rfa_offset = make16(p->rfd_first);
962 p->scb->cmd_ruc = RUC_START;
963 sun3_attn586(); /* start cmd. */
964 WAIT_4_SCB_CMD_RUC(); /* wait for accept cmd. (no timeout!!) */
965}
966
967static void sun3_82586_timeout(struct net_device *dev)
968{
969 struct priv *p = netdev_priv(dev);
970#ifndef NO_NOPCOMMANDS
971 if(p->scb->cus & CU_ACTIVE) /* COMMAND-UNIT active? */
972 {
973 netif_wake_queue(dev);
974#ifdef DEBUG
975 printk("%s: strange ... timeout with CU active?!?\n",dev->name);
976 printk("%s: X0: %04x N0: %04x N1: %04x %d\n",dev->name,(int)swab16(p->xmit_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[0]->cmd_status),(int)swab16(p->nop_cmds[1]->cmd_status),(int)p->nop_point);
977#endif
978 p->scb->cmd_cuc = CUC_ABORT;
979 sun3_attn586();
980 WAIT_4_SCB_CMD();
981 p->scb->cbl_offset = make16(p->nop_cmds[p->nop_point]);
982 p->scb->cmd_cuc = CUC_START;
983 sun3_attn586();
984 WAIT_4_SCB_CMD();
985 netif_trans_update(dev); /* prevent tx timeout */
986 return 0;
987 }
988#endif
989 {
990#ifdef DEBUG
991 printk("%s: xmitter timed out, try to restart! stat: %02x\n",dev->name,p->scb->cus);
992 printk("%s: command-stats: %04x %04x\n",dev->name,swab16(p->xmit_cmds[0]->cmd_status),swab16(p->xmit_cmds[1]->cmd_status));
993 printk("%s: check, whether you set the right interrupt number!\n",dev->name);
994#endif
995 sun3_82586_close(dev);
996 sun3_82586_open(dev);
997 }
998 netif_trans_update(dev); /* prevent tx timeout */
999}
1000
1001/******************************************************
1002 * send frame
1003 */
1004
1005static int sun3_82586_send_packet(struct sk_buff *skb, struct net_device *dev)
1006{
1007 int len,i;
1008#ifndef NO_NOPCOMMANDS
1009 int next_nop;
1010#endif
1011 struct priv *p = netdev_priv(dev);
1012
1013 if(skb->len > XMIT_BUFF_SIZE)
1014 {
1015 printk("%s: Sorry, max. framelength is %d bytes. The length of your frame is %d bytes.\n",dev->name,XMIT_BUFF_SIZE,skb->len);
1016 return NETDEV_TX_OK;
1017 }
1018
1019 netif_stop_queue(dev);
1020
1021#if(NUM_XMIT_BUFFS > 1)
1022 if(test_and_set_bit(0,(void *) &p->lock)) {
1023 printk("%s: Queue was locked\n",dev->name);
1024 return NETDEV_TX_BUSY;
1025 }
1026 else
1027#endif
1028 {
1029 len = skb->len;
1030 if (len < ETH_ZLEN) {
1031 memset((void *)p->xmit_cbuffs[p->xmit_count], 0,
1032 ETH_ZLEN);
1033 len = ETH_ZLEN;
1034 }
1035 skb_copy_from_linear_data(skb, (void *)p->xmit_cbuffs[p->xmit_count], skb->len);
1036
1037#if (NUM_XMIT_BUFFS == 1)
1038# ifdef NO_NOPCOMMANDS
1039
1040#ifdef DEBUG
1041 if(p->scb->cus & CU_ACTIVE)
1042 {
1043 printk("%s: Hmmm .. CU is still running and we wanna send a new packet.\n",dev->name);
1044 printk("%s: stat: %04x %04x\n",dev->name,p->scb->cus,swab16(p->xmit_cmds[0]->cmd_status));
1045 }
1046#endif
1047
1048 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1049 for(i=0;i<16;i++)
1050 {
1051 p->xmit_cmds[0]->cmd_status = 0;
1052 WAIT_4_SCB_CMD();
1053 if( (p->scb->cus & CU_STATUS) == CU_SUSPEND)
1054 p->scb->cmd_cuc = CUC_RESUME;
1055 else
1056 {
1057 p->scb->cbl_offset = make16(p->xmit_cmds[0]);
1058 p->scb->cmd_cuc = CUC_START;
1059 }
1060
1061 sun3_attn586();
1062 if(!i)
1063 dev_kfree_skb(skb);
1064 WAIT_4_SCB_CMD();
1065 if( (p->scb->cus & CU_ACTIVE)) /* test it, because CU sometimes doesn't start immediately */
1066 break;
1067 if(p->xmit_cmds[0]->cmd_status)
1068 break;
1069 if(i==15)
1070 printk("%s: Can't start transmit-command.\n",dev->name);
1071 }
1072# else
1073 next_nop = (p->nop_point + 1) & 0x1;
1074 p->xmit_buffs[0]->size = swab16(TBD_LAST | len);
1075
1076 p->xmit_cmds[0]->cmd_link = p->nop_cmds[next_nop]->cmd_link
1077 = make16((p->nop_cmds[next_nop]));
1078 p->xmit_cmds[0]->cmd_status = p->nop_cmds[next_nop]->cmd_status = 0;
1079
1080 p->nop_cmds[p->nop_point]->cmd_link = make16((p->xmit_cmds[0]));
1081 p->nop_point = next_nop;
1082 dev_kfree_skb(skb);
1083# endif
1084#else
1085 p->xmit_buffs[p->xmit_count]->size = swab16(TBD_LAST | len);
1086 if( (next_nop = p->xmit_count + 1) == NUM_XMIT_BUFFS )
1087 next_nop = 0;
1088
1089 p->xmit_cmds[p->xmit_count]->cmd_status = 0;
1090 /* linkpointer of xmit-command already points to next nop cmd */
1091 p->nop_cmds[next_nop]->cmd_link = make16((p->nop_cmds[next_nop]));
1092 p->nop_cmds[next_nop]->cmd_status = 0;
1093
1094 p->nop_cmds[p->xmit_count]->cmd_link = make16((p->xmit_cmds[p->xmit_count]));
1095 p->xmit_count = next_nop;
1096
1097 {
1098 unsigned long flags;
1099 local_irq_save(flags);
1100 if(p->xmit_count != p->xmit_last)
1101 netif_wake_queue(dev);
1102 p->lock = 0;
1103 local_irq_restore(flags);
1104 }
1105 dev_kfree_skb(skb);
1106#endif
1107 }
1108 return NETDEV_TX_OK;
1109}
1110
1111/*******************************************
1112 * Someone wanna have the statistics
1113 */
1114
1115static struct net_device_stats *sun3_82586_get_stats(struct net_device *dev)
1116{
1117 struct priv *p = netdev_priv(dev);
1118 unsigned short crc,aln,rsc,ovrn;
1119
1120 crc = swab16(p->scb->crc_errs); /* get error-statistic from the ni82586 */
1121 p->scb->crc_errs = 0;
1122 aln = swab16(p->scb->aln_errs);
1123 p->scb->aln_errs = 0;
1124 rsc = swab16(p->scb->rsc_errs);
1125 p->scb->rsc_errs = 0;
1126 ovrn = swab16(p->scb->ovrn_errs);
1127 p->scb->ovrn_errs = 0;
1128
1129 dev->stats.rx_crc_errors += crc;
1130 dev->stats.rx_fifo_errors += ovrn;
1131 dev->stats.rx_frame_errors += aln;
1132 dev->stats.rx_dropped += rsc;
1133
1134 return &dev->stats;
1135}
1136
1137/********************************************************
1138 * Set MC list ..
1139 */
1140
1141static void set_multicast_list(struct net_device *dev)
1142{
1143 netif_stop_queue(dev);
1144 sun3_disint();
1145 alloc586(dev);
1146 init586(dev);
1147 startrecv586(dev);
1148 sun3_enaint();
1149 netif_wake_queue(dev);
1150}
1151
1152#if 0
1153/*
1154 * DUMP .. we expect a not running CMD unit and enough space
1155 */
1156void sun3_82586_dump(struct net_device *dev,void *ptr)
1157{
1158 struct priv *p = netdev_priv(dev);
1159 struct dump_cmd_struct *dump_cmd = (struct dump_cmd_struct *) ptr;
1160 int i;
1161
1162 p->scb->cmd_cuc = CUC_ABORT;
1163 sun3_attn586();
1164 WAIT_4_SCB_CMD();
1165 WAIT_4_SCB_CMD_RUC();
1166
1167 dump_cmd->cmd_status = 0;
1168 dump_cmd->cmd_cmd = CMD_DUMP | CMD_LAST;
1169 dump_cmd->dump_offset = make16((dump_cmd + 1));
1170 dump_cmd->cmd_link = 0xffff;
1171
1172 p->scb->cbl_offset = make16(dump_cmd);
1173 p->scb->cmd_cuc = CUC_START;
1174 sun3_attn586();
1175 WAIT_4_STAT_COMPL(dump_cmd);
1176
1177 if( (dump_cmd->cmd_status & (STAT_COMPL|STAT_OK)) != (STAT_COMPL|STAT_OK) )
1178 printk("%s: Can't get dump information.\n",dev->name);
1179
1180 for(i=0;i<170;i++) {
1181 printk("%02x ",(int) ((unsigned char *) (dump_cmd + 1))[i]);
1182 if(i % 24 == 23)
1183 printk("\n");
1184 }
1185 printk("\n");
1186}
1187#endif